© Author(s) 2015. CC Attribution 3.0 License. The influence of the North Atlantic Oscillation and El Niño–Southern Oscillation on mean and extreme values of column ozone over the United States
Abstract. Continuous measurements of total ozone (by Dob-son spectrophotometers) across the contiguous United States began in the early 1960s. Here, we analyze temporal and spa-tial variability and trends in total ozone from the five US sites with long-term records. While similar long-term ozone cha...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.687.236 http://www.atmos-chem-phys.net/15/1585/2015/acp-15-1585-2015.pdf |
| Summary: | Abstract. Continuous measurements of total ozone (by Dob-son spectrophotometers) across the contiguous United States began in the early 1960s. Here, we analyze temporal and spa-tial variability and trends in total ozone from the five US sites with long-term records. While similar long-term ozone changes are detected at all five sites, we find differences in the patterns of ozone variability on shorter timescales. In ad-dition to standard evaluation techniques, STL-decomposition methods (Seasonal Trend decomposition of time series based on LOESS (LOcally wEighted Scatterplot Smoothing)) are used to address temporal variability and “fingerprints ” of dy-namical features in the Dobson data. Methods from statisti-cal extreme value theory (EVT) are used to characterize days with high and low total ozone (termed EHOs and ELOs, re-spectively) at each station and to analyze temporal changes |
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